<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>index</title>
    <script type = "text/javascript" src = "{{ url_for('static', filename = 'index.js') }}" ></script>
</head>
<body>

    <input type = "button" onclick = "sayHello()" value = "Say Hello" />

</body>
</html>